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13 years ago
Let's assume that our printer is capable of 300dpi I am going to print an 8 x 10 image and my rendered pixel size is 3000 x 2400.
You have Pixel Size and DPI and want image size:
You have Pixel Size and DPI and want image size:
This is useful when you want to know how big an image will print on your page if you do not allow the printer to scale the image at print time. (ie scale to fit).
Image Width = Pixel Width / DPI
Image Width = 3000 pixels / 300DPI
Image Width = 10 Inches
Image Height = Pixel Height / DPI
Image Height = 2400 pixel / 300 DPI
Image Height = 8 Inches
You have Pixel Size and Inches and want DPI
This one is not all that useful and I can't think of any reason to use it practially but here is it anyway.
Horizontal DPI = Pixel Size (Width) / Inches (Width)
Horz. DPI = 3000 pixels /10 inches
Horz. DPI = 300DPI
You can use the same equation for the Vertical DPI as well. Some printer are the same resolution in both axes.
Image Width = 3000 pixels / 300DPI
Image Width = 10 Inches
Image Height = Pixel Height / DPI
Image Height = 2400 pixel / 300 DPI
Image Height = 8 Inches
You have Pixel Size and Inches and want DPI
This one is not all that useful and I can't think of any reason to use it practially but here is it anyway.
Horizontal DPI = Pixel Size (Width) / Inches (Width)
Horz. DPI = 3000 pixels /10 inches
Horz. DPI = 300DPI
You can use the same equation for the Vertical DPI as well. Some printer are the same resolution in both axes.
You have Inches and DPI need pixels
This one is usful when you know that your printer can print 300dpi and you would like to print an image that is 8 x 10 and need to nkow how big to render your final image to do this. Of couse you could always render it bigger, but rendering time is precious so you never want to render more pixels that you have to.
Pixel Width = DPI x inches (Width)
Pixel Width = 300 DPI x 10 inches
Pixel Width = 3000 pixel wide
Again the same formula can be used for pixel Height as well.
This one is usful when you know that your printer can print 300dpi and you would like to print an image that is 8 x 10 and need to nkow how big to render your final image to do this. Of couse you could always render it bigger, but rendering time is precious so you never want to render more pixels that you have to.
Pixel Width = DPI x inches (Width)
Pixel Width = 300 DPI x 10 inches
Pixel Width = 3000 pixel wide
Again the same formula can be used for pixel Height as well.
Sources : Internet & Forum
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